ScienceDaily: Computers and Internet News |
- New computer program aims to teach itself everything about anything
- Quantum computation: Fragile yet error-free
- Long-range tunneling of quantum particles
- Circuits capable of functioning at temperatures greater than 350 degrees Celsius
- Weird 'magic' ingredient for quantum computing: Contextuality
- Viewing deeper into the quantum world
| New computer program aims to teach itself everything about anything Posted: 12 Jun 2014 12:27 PM PDT In today's digitally driven world, access to information appears limitless. But when you have something specific in mind that you don't know, like the name of that niche kitchen tool you saw at a friend's house, it can be surprisingly hard to sift through the volume of information online and know how to search for it. Or, the opposite problem can occur -- we can look up anything on the Internet, but how can we be sure we are finding everything about the topic without spending hours in front of the computer? Computer scientists have created the first fully automated computer program that teaches everything there is to know about any visual concept.  |
| Quantum computation: Fragile yet error-free Posted: 12 Jun 2014 11:22 AM PDT Physicists have experimentally encoded one quantum bit (qubit) in entangled states distributed over several particles and for the first time carried out simple computations on it. The 7-qubit quantum register could be used as the main building block for a quantum computer that corrects any type of error.  |
| Long-range tunneling of quantum particles Posted: 12 Jun 2014 11:22 AM PDT One of the most remarkable consequences of the rules in quantum mechanics is the capability of a quantum particle to penetrate through a potential barrier even though its energy would not allow for the corresponding classical trajectory. This is known as the quantum tunnel effect and manifests itself in a multitude of well-known phenomena. For example, it explains nuclear radioactive decay, fusion reactions in the interior of stars, and electron transport through quantum dots. Tunneling also is at the heart of many technical applications, for instance it allows for imaging of surfaces on the atomic length scale in scanning tunneling microscopes.  |
| Circuits capable of functioning at temperatures greater than 350 degrees Celsius Posted: 12 Jun 2014 05:50 AM PDT Engineering researchers have designed integrated circuits that can survive at temperatures greater than 350 degrees Celsius – or roughly 660 degrees Fahrenheit. Their work will improve the functioning of processors, drivers, controllers and other analog and digital circuits used in power electronics, automobiles and aerospace equipment -- all of which must perform at high and often extreme temperatures.  |
| Weird 'magic' ingredient for quantum computing: Contextuality Posted: 11 Jun 2014 10:18 AM PDT A form of quantum weirdness is a key ingredient for building quantum computers according to new research. Researchers have shown that a weird aspect of quantum theory called contextuality is a necessary resource to achieve the so-called magic required for universal quantum computation.  |
| Viewing deeper into the quantum world Posted: 11 Jun 2014 08:28 AM PDT Researchers have experimentally demonstrated that interferometers, the most sensitive measuring instruments yet invented, can be improved using nonlinear physics. The result answers a fundamental question in quantum mechanics and could open the way to more sensitive detection of magnetic fields in delicate systems such as the human heart.  |
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